Manufacture of bosh-plates.



L. L. KNOX.

MANUFACTURE OF BUSH PLATES.

APPLICATION FILED Nov. 12. 1915.

Patented Dec. 12, 1916.

2 SHEETS-SHEET I.

L. L. KNOX.

MANUFACTURE 0F BO-SH PLATES.

APPLICATION FILED NOV.12. I9.I5

2 SHEETS-SHEET 2.

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Illtl 'PAF LUTHER L. KNOX, OF AVALON, PENNSYLVANIA, ASSIGNOR OF ONE-THIRD TO MONT- GOMERY MURRAY AND ONE-THIRD TO TOI-IN S. CRAIG, BOTH OF PITTSBURGH,

PENNSYLVANIA.

MANUFACTURE OF BOSE-PLATES.

Specification of Letters Patent.

Patented Dec. i2, Mille.

Application led November 12, 1915. Serial N o. 61,091.

To all 'Lo/tom t may concern.'

Be it known that I, LUTHER L. KNOX, a citizen of the United States, residing at Avalon7 Allegheny county, Pennsylvania, have invented a new and useful Improvement in the Manufacture of Bosh-Plates, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which* Figure l is a plan view showing the initial form of the blank. Figs. 2 to l() are sectional views illustrating different steps in the manufacture of the bosh plate, and

Fig. ll is a plan view of the finished bosh i plate.

My invention relates to the manufacture of bosh plates, and is designed to produce a simple and eiicient way of forming a bosh plate from sheet metal.

The nature of my invention will be best understood by reference to the accompanying drawings, which will now be described, it being premised, however, that various changes can be made in the details of manufacture without departing from the spirit and scope of my invention as set forth in the appended claims.

In accordance with my invention, I first provide a sheet metal blank 2 of the general oval form illustrated in Fig. 1 and shown in section in Fig. 2. Bv a series of draw* ing and shaping operations, this blank is then formed into an oblong receptacle, the successive steps gradually reducing the length and width of the receptacle body while incr-casino` its depth. lllhen the structure has been thus shaped to approximately the form indicated in Fig. 8, a bent baffle plate 3, such as shown in Fig. 9 can then be inserted within the structure and secured by welding its edges thereto. The open top of the structrue is then closed, preferably by welding` therein a separate closure plate t. rlhis closure plate may be provided with the sleeves or thimbles 5 welded therein and which serve for water circulating connections. One of these sleeves or thimbles communicates with the space behind the baffle and provides an inlet connection for the cooling water which is compelled to circulate along one side and across the inner end of the structure before it can escape and pass to the other sleeve or thimble which forms the outlet. The body of the structure may be given any usual or desired shape.

My invention provides a sheet metal bosh plate in which the only seam or joint is at the outer end where the closure 4 is welded, and this welding may be carried out in such a manner as to make the structure practically integral at this point.

I claim:

l. In the manufacture of hollow sheet metal bosh plates, the method which consists in providing a sheet metal blank of oval form, and subjecting the same to successive die operations which form the same into a comparatively thin oblong hollow body by gradually decreasing the length and width of said body while increasing its depth, fixing a baille within the hollow body so formed, and then providing a closure for the open side of said body; substantially as described.

2. In the manufacture of hollow sheet metal bosh plates, the method which consists in providing a sheet metal blank of oval form, and subjecting the same to successive die operations which form the same into a comparatively thin oblong hollow body by gradually decreasing the length and width of said body while increasing its depth, securing a baiiie within the hollow body so formed, and then welding a closure member to said body to close its open side; substantially as described.

3. In the manufacture of hollow sheet metal bosh plates, the method which consists in shaping a fiat sheet metal plate into an oblong hollow body closed except at its outer side, placing baffle means within said hollow body, and then securing a separate closing plate within such outer side; substantially as described.

4. In the manufacture of hollow sheet metal bosh plates, the method which consists in shaping a. Vflat sheet metal plate into an oblong hollow body closed except at its outer side, and then securing` a baiiie within the hollow body so formed, and then securing a separate closure plate to the open end of said body; substantially as described.

In testimony whereof, I have hereunto set my hand.

LUTHER L. KNOX. Witnesses:

GEO. II. PARMELEE, I-I. M. CoRwIN.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents.J Washington, D. C. 

